Mailbox



FIG. 1 is a front perspective view of a mailbox, showing my new design, in an open configuration;

FIG. 2 is another front perspective view thereof, in another open configuration;

FIG. 3 is a side view thereof, shown in a closed configuration; and,

FIG. 4 is another front perspective view thereof, in a closed configuration.

The broken line showing of a mailbox is included for the purpose of illustrating only and forms no part of the claimed design. All surfaces not shown form no part of the claimed design. 

CLAIM The ornamental design for a mailbox, as shown and described. 